Nicardipine hydrochloride is a dihydropyridine derivative
with the IUPAC (International Union of Pure and Applied Chemistry) chemical name
(±)-2-(benzyl-methyl amino)ethyl methyl 1,4-dihydro-2,6 dimethyl- 4-(m-nitrophenyl)-3,5-pyridinedicarboxylate
monohydrochloride, and it has the following structure:

Nicardipine hydrochloride is a greenish-yellow, odorless,
crystalline powder that melts at about 169°C. It is freely soluble in
chloroform, methanol and glacial acetic acid, sparingly soluble in anhydrous
ethanol, slightly soluble in n-butanol, water, 0.01 M potassium dihydrogen
phosphate, acetone and dioxane, very slightly soluble in ethyl acetate, and practically
insoluble in benzene, ether and hexane. It has a molecular weight of 515.99.

What are the precautions when taking nicardipine hydrochloride sustained release capsules (Cardene SR)?

Before taking nicardipine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have a certain medical condition. Before using this medicine, consult your doctor or pharmacist if you have: a certain structural heart problem (aortic stenosis).